Marx's Predictions About the Coming of the Communist Revolution in Western

Marx's predictions about the coming of the communist revolution in Western industrialized countries was incorrect because

A) western governments destroyed the proletariat uprisings through military force.
B) the working classes took over the governments peacefully, through use of the ballot.
C) the working class declined with the onset of the second industrial revolution.
D) the capitalist democratic system was able to reform itself through social welfare measures, anti-trust laws, and labor unions.
E) his dialectical materialism was more applicable to pre-industrial societies.